13136526661 has 2 divisors, whose sum is σ = 13136526662. Its totient is φ = 13136526660.

The previous prime is 13136526577. The next prime is 13136526677. The reversal of 13136526661 is 16662563131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9133433761 + 4003092900 = 95569^2 + 63270^2 .

It is an emirp because it is prime and its reverse (16662563131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13136526661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13136526761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6568263330 + 6568263331.

It is an arithmetic number, because the mean of its divisors is an integer number (6568263331).

Almost surely, 2^13136526661 is an apocalyptic number.

It is an amenable number.

13136526661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13136526661 is an equidigital number, since it uses as much as digits as its factorization.

13136526661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 40.

The spelling of 13136526661 in words is "thirteen billion, one hundred thirty-six million, five hundred twenty-six thousand, six hundred sixty-one".